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5Cr21Mn9Ni4N


5Cr21Mn9Ni4N heat-resistant steel is an alloy steel with high strength and good chemical stability at high temperature. It includes oxidation resistant steel (or high temperature steel without peeling) and hot strength steel. Generally, oxidation resistant steel requires good chemical stability, but bears low load. High temperature strength and corresponding oxidation resistance are required for hot strength steel. Heat-resistant steel is often used to manufacture parts that work under high temperature in boiler, steam turbine, power machinery, industrial furnace, aviation, petrochemical and other industrial sectors. In addition to high temperature strength and high temperature oxidation corrosion resistance, these parts also require sufficient toughness, good machinability, weldability and certain organizational stability according to different purposes. China has been producing heat-resistant steel since 1952. Later, some new low alloy heat strength steels have been developed, thus raising the working temperature of pearlitic heat strength steels to 600~620 ℃; In addition, some new low chromium nickel oxidation resistant steel grades have been developed.

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